MESON Chess Problem Database

Problem Display
PID: 58315 (8/B1pRr3/1r1Pn3/Q1b5/R1Nk4/1p1P3p/5N1K/7B w - - 0 1)

Mari, Alberto

1st Prize, Good Companions, 1924

8/B1pRr3/1r1Pn3/Q1b5/R1Nk4/1p1P3p/5N1K/7B

#2

10 + 8

3391 Het Half Pin Thema 1924
1997 Ajedrez 1955

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.dxe7#
    • 1...Rb7
      • 2.dxe7#
    • 1...Rb8
      • 2.dxe7#
    • 1...Ba3
      • 2.Qe5#
    • 1...Bb4
      • 2.Qe5#
    • 1...Bxd6+
      • 2.Qe5#
  • Tries
    • 1.dxc7+?
      • 1...Rd6
        • 2.Rxd6#
      • 1...Bd6+
        • 2.Rxd6#
        • 2.Qe5#
      • 1...Rxd7!
    • 1.dxe7+?
      • 1...Bd6+
        • 2.Qe5#
      • 1...Rd6!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Qc3#
      • 1...Bxd6+
        • 2.Se5#
      • 1...Kxd3
        • 2.Qd2#
      • 1...Rb4
        • 2.dxe7#
      • 1...Ba3
        • 2.Qd5#
      • 1...Bb4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(e);N_GUARD,P_SPINB(d)::R(J)+P(H),XR(h)
    • B(d);OGATE,P_SPINR(e)::QAB1(G)
    • B(d);CHECK,OGATE,P_SPINB(d),P_SPINR(e),XP(H)::QAB1(G)
  • Tries
    • Try
      • P(H);CHECK,XP(g)
      • Vars
        • R(e);N_GUARD,P_SPINB(d),P_SPINR(e)::R(J),XR(e)
      • Refutation
        • R(h);XR(J)
    • Try
      • P(H);CHECK,XR(h)
      • Vars
        • B(d);CHECK,OGATE,P_SPINB(d),P_SPINR(e)::QAB1(G)
      • Refutation
        • R(e);P_SPINB(d),P_SPINR(e)
  • Actual
    • S(B);
    • Threat
      • QAB1(G)
    • Vars
      • B(d);CHECK,N_GUARD,P_SPINB(d),P_SPINR(e),XP(H)::R(E)+S(F)
      • K(c);OGATEB,P-FLIGHT,XP(D)::QAR1(G)
      • R(e);N_GUARD,P_SPINB(d)::R(J)+P(H),XR(h)
      • B(d);OGATE,P_SPINR(e)::QAR1(G)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).